Messatoporus dissidens Santos, 2013

Santos, Bernardo F. & Aguiar, Alexandre P., 2013, <strong> Phylogeny and revision of <em> Messatoporus </ em> Cushman (Hymenoptera, Ichneumonidae, Cryptinae), with descriptions of sixty five new species </ strong>, Zootaxa 3634 (1), pp. 1-284 : 113-114

Messatoporus dissidens Santos , sp. nov.

( Figs 100 , 203 , 321 )

Female. Fore wing 6.6 mm. HEAD: Mandible densely covered with long hairs; MLW 2.19; MWW 0.34; dorsal tooth in front view projected upwards, much longer than ventral tooth; ventral tooth triangular. MSM 0.37. Clypeus slightly and more or less uniformly convex, centrally straight; CHW 2.6; CWW 2.5; apical area medially concave, laterally with distinct triangular lobes, its margin regular, not raised. Antenna with 24 flagellomeres; flagellum uniform; apex of apical flagellomere much narrower than base, distinctly tapered. Supra-antennal area shiny, scarcely punctate, distinctly striate near antennal sockets, ventrally distinctly concave, without median line. Occipital carina uniformly curved, fading out at distance shorter than basal width of mandible from the hypostomal carina. Temple and gena moderately wide, gena regular (as in Fig. 260 ).

THORAX: Pronotum centrally glabrate, moderately pilose at dorsal margin, shiny, impunctate, with weak and short wrinkles at ventral half of posterior margin; epomia weak, complete, short, ending far from dorsal margin of pronotum, after diverging from pronotal collar distinctly curved. Mesoscutum strongly and uniformly convex, subcircular, 1.15 × as long as wide, anteriorly densely pilose, posteriorly sparsely pilose, shiny, impunctate; notaulus reaching about 0.77 of mesoscutum length, weakly impressed, surface over notaulus not wrinkled; scutoscutellar groove moderately deep, without wrinkles. Subalar ridge weakly projected; epicnemial carina reaching about 0.7 of distance to subalar ridge, irregular; sternaulus moderately strong, wide and shallow at posterior 0.25, strongly sinuous, with weak vertical wrinkles; scrobe moderately deep; mesopleural suture with strong longitudinal wrinkles restricted to ventral portion. Mesosternum medially with short transverse wrinkles; median portion of posterior transverse carina of the mesothoracic venter short, arched backwards. Transverse sulcus at base of propodeum very wide, about 0.87 × as long as anterior area of propodeum, impunctate; metapleuron punctaterugulose, without transverse wrinkles, moderately pilose; juxtacoxal carina represented by very short ridges. Fore tibia weakly swollen. Mesal lobe of t4 with 3–4 bristles. Hind coxa with moderately strong punctures separated by about their own diameter.

PROPODEUM: 1.12 × as long as wide, shiny, moderately pilose; anterior area moderately punctate; spiracle elliptic, SWL 2.8; anterior transverse carina medially straight. Propodeal wrinkles strong, closely spaced, anteriorly faint at median portion, posteriorly partly complete and partly incomplete, mostly slightly curved or somewhat sinuous; posterior transverse carina entirely absent.

WINGS: Fore wing vein 1-Rs+M distinctly sinuous, with bulla placed on basal 0.25; crossvein 1m-cu more or less uniformly curved, limit between 1m-cu and 1-Rs+M more or less traceable; vein 1M+Rs entirely irregular; fore wing crossvein 1 cu-a basad of 1M+Rs by 0.54 of its own length; vein 2Cua 0.18 × as long as crossvein 2cu-a; bulla of crossvein 2m-cu placed on midlength; cell 1+2Rs small, APH 0.7, pentagonal, about as high as wide, AWH 1.12; crossvein 3r-m fully spectral, 2r-m and 3r-m distinctly convergent, 3r-m distinctly shorter; vein 3-M distinctly longer than 2-M; 4-Rs distinctly sinuous; 4-M tubular, irregular. Hind wing vein 1-M forming distinctly obtuse angle with vein Cua; vein 2-Rs tubular, apically spectral, reaching wing margin; HW1C 0.92; vein Cub distinctly convex on posterior half, forming distinctly obtuse angle with vein Cua (basally curved); vein 2-1A reaching 0.67 of distance to posterior wing margin.

METASOMA: First tergite moderately long, about 0.4 × as long as T2–8, strongly depressed, ventrolaterally rounded, dorsally glabrate, laterally densely pilose; T1LW 3.67; T1WW 1.67; spiracle on 0.49 of its length, distinctly prominent; median depression elongate, very shallow; lateral and median posterior depressions absent; ventrolateral carina absent, but traceable as limit between lateral and ventral portions. T2LW 1.12; T2WW 2.28; thyridium longer than wide, without small circular depression just behind it; T2–8 covered with small, shallow foveae, densely and uniformly pilose. OST 0.88; ovipositor slender, straight, basally cylindric, apically slightly depressed; dorsal valve without ridges; ventral valve apex with 8 teeth, apical teeth progressively more closely spaced; surface anterior to first tooth not rugulose.

Color. Head and mesosoma black with whitish marks, metasoma orange with black and whitish marks. Head: black; clypeus, mandible except apex, mouthparts, malar space, supra-clypeal area, scape ventrally and complete orbital band, whitish (234,221,174); orbital band area at lower gena with small blackish spot; pedicel, scape dorsally and f1 ventrally, fulvous (176,105,060); f9–14 entirely white, f8 and f15 partially white. Mesosoma: black; collar and dorsal margin of pronotum connected, subcircular spot on mesoscutum, scutellum, tegula, subalar ridge, central mark on mesopleuron, dorsal spot at hypoepimeron, dorsal division of metapleuron, transverse sulcus centrally, metapleuron except anterior and ventral margins and apical semicircular mark covering 0.3 of propodeum, whitish; axillar carinae laterally fulvous; fore and mid tibiae and first trochanter except small apical spot, whitish; fore second trochanter and femur ventrally whitish, dorsally pale orange with weak brown stripe; fore tibia whitish, ventrally with weak brown stripe; t1–4 whitish, t5 blackish; mid first trochanter whitish with anterior and posterior black stripes; second trochanter and femur pale orange, femur dorsally with weak brown stripe; mid tibia whitish, tibial spurs and tarsus blackish; hind coxa basal 0.4 blackish, apical 0.6 whitish with longitudinal black stripe; first hind trochanter blackish, second trochanter and femur bright orange (210,112,049), with small yellow mark between the two articles, apical margin of femur blackish; basal 0.25 of hind tibia, apical 0.6 of t1 and t2–4, whitish; remainder of tibia and tarsus black. Mesosoma: bright orange; T1 black, anterior 0.4 dorsally and posterior 0.1, whitish; S1 whitish; T2 anterior 0.6 blackish, posterior 0.4 turning from orange to bright yellow; T3–8 anteriorly dark fulvous, posteriorly turning to bright orange; T7 with narrow posterior white stripe.

Male. Fore wing 6.85–7.37 mm long. Similar to female, except for the following: malar space entirely whitish; antenna with 23–25 flagellomeres, flagellum basally light brown, blackish towards apex; axillar carinae blackish; ventral 0.4 of mesopleuron and mesosternum whitish; black areas on metapleuron smaller; T2–7 anteriorly dark to light brown, with progressively shorter posterior whitish stripe.

Variation. One specimen with gena without blackish spot at orbital band area, central mark on mesopleuron small and base of T2–8 fuscous, apically light fulvous. Males sometimes with pronotum almost entirely whitish; anterior whitish mark at dorsal T1 sometimes very small;

Comments. Somewhat similar to M. tenuissimus sp. nov., from which it can be differentiated mainly by body generally stouter (see Figs 99–100 ); mesopleuron with an elongate, medium sized central mark and a small mark at hypoepimeron (vs. with a single, small subcircular yellowish mark); metapleuron with about 0.4 of its surface black (vs. entirely yellowish); first tergite moderately long, 0.40 × as long as T2–8 (vs. short, 0.29 as long as T2–8); and ovipositor dorsal valve without ridges (vs. with four moderately strong ridges).

Also similar to M. bimaculatus sp. nov. and M. unimaculatus sp. nov. It can be isolated from both species by the color pattern of the metasoma, mostly orange, each tergite anteriorly light brown (vs. T2–8 blackish, with posterior yellowish stripe); mesopleuron with two unequal yellowish marks (vs. with a single large mark or two subcircular marks with about the same size); scape ventrally whitish (vs. entirely black); mesoscutum very strongly convex (vs. moderately convex); and propodeum with subcircular yellowish mark (vs. with two sublateral marks).

Biology. Unknown.

Etymology. From the Latin dissidens , meaning “disagreeing”; in reference to the color pattern of the metasoma, differing between males and females.

Material examined. 2 ♀, 4 ♂♂. Holotype ♀ from ARGENTINA, Tucumán, Horco Molle , 16.I.1996, yellow pans, MJSharkey ( CNCI). Mounted on triangle point. In good shape.

2 ♂♂ from URUGUAY, Tacuarembó, 40 km NW Tacuarembó , 2–9.II.1963, JKBouseman ( AMNH) . 1 ♀ from ARGENTINA, Tucumán, Horco Molle , 14–16.III.1966, LStange ; 1 ♂, same data except 7–13.III.1966 ( AEIC) ; 1 ♀, same data except 16.I.1996, yellow pans, MJSharkey ( CNCI) . 1 ♂ from ARGENTINA, La Rioja, Sta. Cruz, near Anillaco , 1700 m, humid ravine, 6.IV.2002, Malaise trap, Pfidalgo ( FSCA) .

Distribution. Northwestern Argentina and Uruguay ( Fig. 321 ).

Figures

FIGURES 96–100. Lateral view. 96, M. bennetti*. 97, M. bimaculatus*. 98, M. unimaculatus*. 99, M. tenuissimus*. 100, M. disidens*.

FIGURES 198–206. Propodeum, dorsal view. 198, M. maculipes. 199, M. caxiuanensis*. 200, M. amazonensis. 201, M. variegatus. 202, M. atrifoveus*. 203, M. dissidens*. 204, M. complexifemur. 205, M. copiosus. 206, M. ellipsicavus*.

FIGURES 321–328. Distribution maps for species of Messatoporus. 321, M. dissidens. 322, M. dominicanus. 323, M. elektor. 324, M. ellipsicavus. 325, M. euryoikos. 326, M. femorator. 327, M. fulvator. 328, M. grandis.

FIGURES 260–271. 260–261, Gena, lateral. 260, M. longicaudis*. 261, M. compressicornis. 262–264, Antenna. 262, M. tibiator. 263, M. compresscornis. 264, M. antennator, male. 265–266, Hind t4. 265, M. paeneater*. 266, M. nigriscutus*. 267–271, Metasoma and ovipositor. 267, M. opacus*. 268, M. discoidalis. 269, M. longicaudis*. 270, M. convexus. 271, M. townesi.